NATURALLY OCCURRING ENZYME ACTIVITY VARIATION IN DROSOPHILA MELANOGASTER. I. SOURCES OF VARIATION FOR 23 ENZYMES

摘要: The genetic component of variation enzyme activity levels in Drosophila melanogaster was investigated by using 48 second- and third-chromosome isogenic substitution lines derived from natural populations. results confirm those our earlier experiments with the same extend them to a number additional enzymes. All 23 enzymes show significant one or both sets only small part this is accounted for among amount tissue per fly. magnitude line effects is, most cases, considerably larger than environmental measurement error effects, are approximately continuous distribution. Variation geographic origin karyotype chromosomes generally does not contribute variation, but allozymes provide an important source few Many evidence modifiers that linked structural locus enzyme.